Comparative energy and exergy investigations are reported for a transcritical N2O refrigeration cycle with a throttling valve or with an expander when the gas cooler exit temperature varies from 30 to 55 ◦C and the evaporating temperature varies from −40 to 10 ◦C. The system performance is also compared with that of similar cycles using CO2. Results show that the N2O expander cycle exhibits a l...

BACKGROUND CGCryoDerm was first introduced in 2010 and offers a different matrix preservation processes for freezing without drying preparation. From a theoretical perspective, CGCryoDerm has a more preserved dermal structure and more abundant growth factors for angiogenesis and recellularization. In the current study, the authors performed a retrospective study to evaluate freezing- and freeze...

A multi-variable optimization program has been developed to investigate the performance of Wet Organic Rankine Cycles for low temperature heat recovery applications. This cycle model contains a detailed thermodynamic model of the twin-screw expander, and the methods used to match the operation of the expander to the requirements of the cycle are described. The capability of the cycle model has ...

PURPOSE Prosthetic-based breast reconstruction is performed with increasing frequency in the United States. Major mastectomy skin flap necrosis is a significant complication with outcomes ranging from poor aesthetic appearance to reconstructive failure. The present study aimed to explore the interactions between intraoperative fill and other risk factors on the incidence of flap necrosis in pat...

BACKGROUND The objective of this paper was to describe a novel technique for improving the maintenance of nipple projection in primary nipple reconstruction by using acellular dermal matrix as a strut in one of three different configurations, according to the method of prior breast reconstruction. The struts were designed to best fill the different types of dead spaces in nipple reconstruction ...

Background: As breast tissue expanders consist of metallic materials in the needle guard and ferromagnetic injection port, irradiation can produce radioactivation.Materials Methods: A CPX4 (Mentor Worldwide LLD) expander was exposed using Versa HD (Elekta) linear accelerator. Two photon energies 6 10 MV-flattening filter free (FFF) beams with 5,000 monitor units (MU) were irradiated to identify...

Abstract Background Immediate breast reconstruction with tissue expander in cancer patients who were expected to receive adjuvant therapy, such as chemotherapy or radiotherapy, has been a topic of debate. Postoperative complications from procedures can delay the timing treatment and subsequently increase probability recurrence. The purpose this study was identify impact radiotherapy on postoper...

BACKGROUND As the U.S. population becomes increasingly overweight, a growing number of patients with body mass indexes greater than 30 are seeking mastectomy reconstruction. The authors' purpose was to prospectively evaluate the effect of body mass index on patient satisfaction with breast reconstruction. METHODS Women undergoing first-time breast reconstruction at one of 12 centers in the Un...